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EP0352256B1 - Automatic levelling device - Google Patents

Automatic levelling device Download PDF

Info

Publication number
EP0352256B1
EP0352256B1 EP87902796A EP87902796A EP0352256B1 EP 0352256 B1 EP0352256 B1 EP 0352256B1 EP 87902796 A EP87902796 A EP 87902796A EP 87902796 A EP87902796 A EP 87902796A EP 0352256 B1 EP0352256 B1 EP 0352256B1
Authority
EP
European Patent Office
Prior art keywords
seat
drive means
vehicle
upper plate
lower plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87902796A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0352256A1 (en
Inventor
Jan Wallin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT87902796T priority Critical patent/ATE90041T1/de
Priority to DE87902796T priority patent/DE3786086T2/de
Publication of EP0352256A1 publication Critical patent/EP0352256A1/en
Application granted granted Critical
Publication of EP0352256B1 publication Critical patent/EP0352256B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/0244—Non-manual adjustments, e.g. with electrical operation with logic circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/38—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles specially constructed for use on tractors or like off-road vehicles
    • B60N2/39—Seats tiltable to compensate for roll inclination of vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/0244—Non-manual adjustments, e.g. with electrical operation with logic circuits
    • B60N2/026—Non-manual adjustments, e.g. with electrical operation with logic circuits varying hardness or support of upholstery, e.g. for tuning seat comfort when driving curved roads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/0244—Non-manual adjustments, e.g. with electrical operation with logic circuits
    • B60N2/0268—Non-manual adjustments, e.g. with electrical operation with logic circuits using sensors or detectors for adapting the seat or seat part, e.g. to the position of an occupant

Definitions

  • the invention relates to an automatic levelling device for a vehicle seat, having at least one linearly working drive means operatively connected on the one hand to the vehicle seat, which is pivotable relative to the vehicle about at least one axis, and on the other hand to the vehicle, and having at least one detecting means for detecting the position of the seat relative to the horizontal plane, said detecting means, when the seat deviates from the horizontal plane, delivering a signal to the drive means for returning the seat to its horizontal position, and an upper plate for supporting the seat, said upper plate being pivotally journalled to a lower plate to be mounted on the vehicle, the drive means being provided between the upper and lower plates completely within the space delimited by the plates.
  • a device is known for example from US-A-4 095 770.
  • Devices of the kind indicated above are primarily used for the driver's seat in tractors and other construction or working vehicles and cross-country vehicles. The purpose thereof is above all to prevent back-injuries and pain in the back for the driver of such vehicles when driving over rough terrain, for instance for the driver of a tractor during plowing when one of the wheels of the tractor runs on unplowed ground and the other wheel runs in a plowed furrow. Should the driver's seat be fixed in such a situation this would mean that the body of the driver would be inclined or tilted, which might lead to the above mentioned trouble, especially if the ground is also rough so that the driver is constantly subjected to jolts and vibrations in such a position. Apart from this a device of the above described kind also permits a much more comfortable driving position which enhances the capability of manoeuvering the vehicle, for instance when driving on a bank.
  • US patent specification US-A-2 966 937 does disclose a device of the kind described in the introduction, which employs electrical motors for adjusting the position of the seat.
  • this known device also suffers from the disadvantage of being bulky, in this case especially in its height.
  • this device employs rotary drive means which through a screw and worm gear operate a threaded rod vertically positioned between the vehicle seat and the vehicle for adjusting the position of the vehicle seat when being driven up and down.
  • this known device requires that a relatively large vertical space is available at the driver's stand so that the adjusting apparatus can be mounted between the seat and the vehicle without unduly restricting the remaining space above the seat, and this means that the known device cannot be used for subsequent installment in driving compartments on existing vehicles where the vertical space is already restricted.
  • the object of the present invention is therefore to provide a device of the kind mentioned in the introduction, which device is compact and requires a minimum of space so that it can be installed in practically any vehicle, and which is at the same time simple and unexpensive to manufacture.
  • the levelling device 1 basically consists of an upper plate 2 and a lower plate 3 which in the illustrated embodiment have a substantially square shape, as seen in a plane view, but which may naturally have any other suitable shape.
  • the upper plate 2 is provided with a number of mounting holes 4 for mounting a driver's seat 11 (Fig. 4) thereon and the lower plate 3 is provided with a number of mounting holes 5 for mounting the device directly on the vehicle or alternatively on a bracket or console.
  • the upper plate 2 and the lower plate 3 are both provided with substantially triangular side walls 2a and 3a, respectively, which are positioned at two opposite side edges thereof and perpendicularly to the plates.
  • the side walls 2a, 3a are, adjacent the apex of their triangular shape provided with holes 6 and 7, respectively, for receiving a bearing 8 for pivotal mounting of the plates relative to each other.
  • the bearing is not illustrated in detail and may be of any suitable kind permitting a relatively frictionless pivoting of the plates in relation to each other.
  • the upper plate is preferably provided with a support plate 9 which is fixed to, for instance welded to, the bottom side of the upper plate 2 adjacent and inwardly of one of the side walls 2a.
  • This support plate is provided with a hole 9a corresponding to the hole 6 of the side wall 2a.
  • a support plate 10 is welded to the bottom side of the upper plate 2 adjacent and inwardly of the opposite side wall 2a in order to support the other pivotal mounting.
  • this support plate 10 is also provided with a hole 10a corresponding to the hole 6 in the other side wall 2a of the upper plate.
  • a linearly working drive means 12 which is illustrated somewhat schematically in Figs. 2a, 3a-c and 5.
  • the device according to the invention preferably employs an electrical adjusting means such as SKF type CATR/L 12.
  • the drive means 12 has a retractable and extendable operating rod 13 the outer free end of which is fixed in a block 14 such as by means of bolts 15 extended through the block 14 and screwed into threaded bores in the end portion of the operating rod 13.
  • the block 14 On each side of the operating rod 13 the block 14 is provided with arms 16 which are firmly connected thereto and which at their opposite ends are pivotally mounted ⁇ in relation to the upper plate 2.
  • the arms 16 are pivotally mounted in further support plates 17 which are welded to the upper plate 2 at a sufficient distance from each other to make sure that the drive means 12 can be received therebetween.
  • the support plates 17 slope down towards the plate 2, and one of the support plates is illustrated extended all the way down to the edge of the plate in order to further increase the stability. It is possible to give both support plates this shape.
  • the housing of the drive means 12 is provided with an attachment 18, usually in the shape of a clevis, by means of which it is pivotally connected to a support plate 19 welded to the upper side of the lower plate 3, whereby the pivotal connection is achieved in a well-known manner by means of a pivoted mounting 20 which is not described in detail but which could for instance consist of a pin and a bushing.
  • this is, in the preferred embodiment, mounted at a position substantially centrally between the side walls 2a, 3a of the plates 2, 3.
  • the drive means displaced to one side (Fig. 5), whereby one of the arms, as illustrated, may be journalled in the support plate 10, which in this case is given a greater height, so that one of the further support plates 17 can be eliminated.
  • the control unit 21 For controlling the drive means 12, which is powered through the ordinary electrical system of the vehicle or possibly through a separate battery, there is provided a control unit 21 which is only schematically indicated in Fig. 5.
  • the control unit 21 is preferably an electronic control circuit composed of standard components and therefore not necessitating any detailed description thereof.
  • the electronical circuit is provided in a protective casing which preferably also contains a not shown detecting means for detecting the position of the upper plate 2 and thus also for the seat 11 in relation to the horizontal. In this case, when the detecting means is also contained in the casing of the control unit 21 this casing should naturally be mounted on the bottom side of the upper plate 2, as schematically illustrated in Fig. 5.
  • the detecting means may be of any suitable kind, such as a mercury switch, an inertia sensitive pendulum or a photo-cell.
  • the detecting device When the detecting device detects tilting of the upper plate 2 in either direction in relation to the horizontal plane it delivers a corresponding signal to the control unit which is preferably provided with a time delay function of for instance 1 to 3 seconds securing that the drive means is not activated by transitory tilts, so that the levelling device is not activated by smaller unevenness of the ground.
  • the upper plate 2 when they are in a position parallel with each other, the upper plate 2 according to the invention may be tilted or pivoted approximately 13 o to 15 o in either direction in relation to the lower plate 3.
  • the drive means 12 preferably comprises limit switches in connection with the control rod 13, by means of which limit switches the stroke of the control rod and thereby the angles may be optionally adjusted.
  • a typical value of the angle of adjustment has been found to be approximately 10 o in either direction.
  • a rubber bellow 22 which is schematically illustrated in Fig. 4, is preferably fitted over the upper and lower plates 2 and 3, thereby preventing dirt and other pollutions from entering the space between the plates.
  • the device has so far been described with specific reference to an embodiment where the upper plate 2 is only pivotal about an axis parallel with the lower plate it should also be realized that within the scope of the invention the device may also be modified in such away that the upper plate is adjustable about two axis which are positioned substantially perpendicularly in relation to each other.
  • a second drive means 12' schematically illustrated in Fig. 5 is mounted such that its control rod 13' is extended perpendicularly to the control rod 13 of the first drive means 12.
  • the upper plate 2 is naturally provided with corresponding additional support plates and arms and is the lower plate is provided with a corresponding additional support plate.
  • the control unit 21 is also provided with a second detecting means for detecting the tilt of the upper plate about the additional axis.
  • This modified embodiment does not bring about any increase in the vertical height of the device but possibly the dimensions of the upper and lower plates will have to be increased somewhat to make room for the two drive means. Moreover it may be necessary to give the support plates a specific shape in order to make room for the two drive means, but such modifications lie well within the competence of a man skilled in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)
  • Transplanting Machines (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Soil Working Implements (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Details Of Television Scanning (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Threshing Machine Elements (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
EP87902796A 1987-03-11 1987-03-11 Automatic levelling device Expired - Lifetime EP0352256B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT87902796T ATE90041T1 (de) 1987-03-11 1987-03-11 Selbsttaetige niveauregelung.
DE87902796T DE3786086T2 (de) 1987-03-11 1987-03-11 Selbsttätige niveauregelung.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1987/000122 WO1988006984A1 (en) 1987-03-11 1987-03-11 Automatic levelling device

Publications (2)

Publication Number Publication Date
EP0352256A1 EP0352256A1 (en) 1990-01-31
EP0352256B1 true EP0352256B1 (en) 1993-06-02

Family

ID=20367163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87902796A Expired - Lifetime EP0352256B1 (en) 1987-03-11 1987-03-11 Automatic levelling device

Country Status (12)

Country Link
US (1) US5054739A (fi)
EP (1) EP0352256B1 (fi)
JP (1) JPH0764239B2 (fi)
KR (1) KR890700490A (fi)
AT (1) ATE90041T1 (fi)
AU (2) AU602139B2 (fi)
BR (1) BR8707975A (fi)
CA (1) CA1284764C (fi)
DK (1) DK172968B1 (fi)
FI (1) FI894076A0 (fi)
NO (1) NO169056C (fi)
WO (1) WO1988006984A1 (fi)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5588704A (en) * 1992-08-13 1996-12-31 Harza; Richard D. Ergonomic antifatigue seating device and method
FR2735096B1 (fr) * 1995-06-09 1997-08-29 Aerospatiale Siege orientable de securite pour un vehicule tel qu'un aeronef.
AUPN786796A0 (en) * 1996-02-05 1996-02-29 Verward Pty Ltd (trading as Brooks Merchants) Vehicle seat
AU688227B2 (en) * 1996-02-05 1998-03-05 Verward Pty. Ltd. Seat for self-propelled narrow-track vehicle
US5884885A (en) * 1996-07-18 1999-03-23 Schmidt, Jr.; Anthony P. Cradle assembly
SE9603786D0 (sv) * 1996-10-16 1996-10-16 Klc Metallkonsult Ab Självnivellerande anordning för en sits
US6026920A (en) * 1998-06-02 2000-02-22 Edward G. Obeda Dynamic seat-moving and leveling device
DE20101762U1 (de) 2001-02-01 2001-05-10 Rettenbacher, Josef, St. Koloman Fahrzeug-Sitzanordnung
US7490903B2 (en) * 2006-05-23 2009-02-17 Ruppe Fredy L Tiltable seat mounting apparatus
US20080054150A1 (en) * 2006-09-06 2008-03-06 Stuby Lyle J Seat tilting mechanism
US7707955B1 (en) 2007-08-07 2010-05-04 Sealift, Inc. Transom platform lifting apparatus and method
US8950809B2 (en) 2011-10-06 2015-02-10 Thorley Industries Llc Child restraint system with user interface
US10046677B2 (en) 2013-04-23 2018-08-14 Clearmotion Acquisition I Llc Seat system for a vehicle
EP3434147B1 (de) * 2017-07-28 2021-01-27 Johannes Uhlenbrock Stuhl
DE102018112004B4 (de) * 2018-05-18 2021-08-05 Grammer Aktiengesellschaft Fahrzeugsitz mit einer Federeinrichtung
WO2021180764A1 (en) * 2020-03-12 2021-09-16 Medirent Ringgenberg Chair
JP7484829B2 (ja) * 2021-06-29 2024-05-16 トヨタ自動車株式会社 椅子

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2141046A1 (de) * 1971-08-17 1973-02-22 Schulte Vieting Detlev Dipl In Bewehrungselement fuer vorgefertigte duennschalige grossflaechen-stahlbetonverbundplatten

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128273A (en) * 1936-10-16 1938-08-30 Bucyrus Erie Co Leveling device
US2202009A (en) * 1938-05-21 1940-05-28 Bucyrus Erie Co Leveling device
US2790119A (en) * 1950-01-19 1957-04-23 Bendix Aviat Corp Servosystem stabilized platform
US2893134A (en) * 1954-03-22 1959-07-07 Preco Inc Automatic leveling control and clinometer
US2872200A (en) * 1955-08-16 1959-02-03 Deere & Co Leveling control for hillside machines
US2966937A (en) * 1958-07-15 1961-01-03 Rudolph C Rydberg Self-levelling seat support
US3021107A (en) * 1958-12-18 1962-02-13 Kenneth C Salo Self leveling tractor and implement seat
US3315934A (en) * 1965-05-05 1967-04-25 Taylor Ora Quinton Self-leveling seat for tractors
US3269685A (en) * 1965-05-28 1966-08-30 Frank Hamachek Machine Company Leveling control for electrically operating hydraulic leveling means
US3341165A (en) * 1965-09-08 1967-09-12 Taylor Ora Quinton Automatic leveling seat for tractors and the like
DE1555946B2 (de) * 1966-09-07 1978-04-13 Kloeckner-Humboldt-Deutz Ag, 5000 Koeln Arbeitsfahrzeug, insbesondere Schlepper
US3741511A (en) * 1971-06-01 1973-06-26 G Streeter Seat tilting structure
DE2142046A1 (de) * 1971-08-21 1973-02-22 Aristomenis Christodoulopoulos Kybernetische sitzregelung beim autofahren
US3836162A (en) * 1973-04-12 1974-09-17 F Felkner Self-levelling support for refrigerator or the like
DK484073A (fi) * 1973-09-03 1975-05-05 L J Rasmussen
DE2537174A1 (de) * 1975-08-21 1977-03-03 Rudolf Ing Grad Steigerwald Fahrersitz mit horizontalschwingvorrichtung und daempfung
SE7603120L (sv) * 1976-03-09 1977-09-10 Ostbergs Fabriks Ab Anordning vid forarsits pa terrenggaende arbetsfordon
NO140961C (no) * 1976-08-03 1979-12-19 Ivar Kalvatn Innretning paa stol til bruk i baater eller kjoeretoeyer
DE2637411A1 (de) * 1976-08-19 1978-02-23 Fritzmeier Kg Georg Scherensystem fuer fahrzeugsitze
US4095770A (en) * 1976-11-01 1978-06-20 Long Daniel C Tiltable seat for tractor and the like
FR2450172A1 (fr) * 1979-03-02 1980-09-26 Renard Jacques Perfectionnements aux supports de sieges de vehicules, notamment de tracteurs agricoles
FR2472491A1 (fr) * 1979-12-26 1981-07-03 Levy Pierre Siege a inclinaison reglable, notamment pour tracteur

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2141046A1 (de) * 1971-08-17 1973-02-22 Schulte Vieting Detlev Dipl In Bewehrungselement fuer vorgefertigte duennschalige grossflaechen-stahlbetonverbundplatten

Also Published As

Publication number Publication date
NO169056C (no) 1992-05-06
WO1988006984A1 (en) 1988-09-22
JPH0764239B2 (ja) 1995-07-12
AU7234687A (en) 1988-10-10
ATE90041T1 (de) 1993-06-15
NO884730L (no) 1988-10-24
DK172968B1 (da) 1999-10-25
BR8707975A (pt) 1990-04-17
JPH02502448A (ja) 1990-08-09
US5054739A (en) 1991-10-08
AU6707290A (en) 1991-02-14
KR890700490A (ko) 1989-04-25
DK622088A (da) 1988-11-08
AU623295B2 (en) 1992-05-07
EP0352256A1 (en) 1990-01-31
FI894076A (fi) 1989-08-30
AU602139B2 (en) 1990-10-04
NO884730D0 (no) 1988-10-24
FI894076A0 (fi) 1989-08-30
DK622088D0 (da) 1988-11-08
NO169056B (no) 1992-01-27
CA1284764C (en) 1991-06-11

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